silverrat | 8c090285f4fee9ef2441de1c9a6404ec10afb06aa606194b09ee8b0e615990d6

General

Target

Adobe Photoshop.scr
Size

49KB
MD5

ea2a040747c7fde2a7a96a1a8d346823
SHA1

2e4573e863fbd174fa3e12c8e2d57f2d6dc4f8ea
SHA256

8c090285f4fee9ef2441de1c9a6404ec10afb06aa606194b09ee8b0e615990d6
SHA512

4bfb7cb68a3a5eea737e089d3947a51a1b39d615985505e5d8ab27b214b0f1655bf9f203701694342e5edacb6c204938358460f04a5bc2d2f58ffb6b8961afe2
SSDEEP

768:2NJXw9WvC9nPpT3RSW/Cv2YzidgrRUTO9PIKqz1QB6SRm1RvrkV8TMBGVmL:2NJg9WAPuDziYGK9M1QoSuRIV/YVmL

Score

10^/10

silverrat evasion persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

162.238.154.3:9999

Mutex

lAxDBRhAFu

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1224063920910893078/rfkgDONjwpAbC7HNPp0njOftIevoWdnsfbJbIYqE6EsxJLN2qDP4K9endsFKsSJdYJfj
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
b0FGeVZNcFRMWVloVHR6Z0VESU5RdlpZUmxZbUFE
payload_url
https://g.top4top.io/p_2522c7w8u1.png
reconnect_delay
4
server_signature
t9H0tGywaq23QHywsvniYlva2DUEoHwEX4RZOKw6QYOUUUEs6+qPhkwL0ziJc2nYj2yd5E4o3kMJj8NRpRTkpZcyIg/ljsBjIY4uuTgySYNYShSJRrNgQc/XiUXjH546feRdpS3EuZPWH15iNA3U89kmdXU1BOtms28guz5MUZ/jdeGBHbjPJULpyM8EgGGdK3ajqJ+NWQxPHql47XGQFXqJ5PauE0xmpcMKt+LU7fe+NS0Yx11uv+tRwSlMmFhYU9pSYoS8zZ7Lyeaw8rcxs06oecNxLKcmbSH3H5QWo4qYq/Y7HAeBmLEHHB5t8+bCVeDMfccmct8s+aZpljSceGlri2HJsxEjZ7FYmh4+o8bhacTmqQyE99P1kSa4FAWPLn59j5s1nO91Sb/rMvcNUApgatm6ZRZjc+Ninv7rXwFncnT7eRSRvldp7PohX6bsJEJRMnfLT4YxM0TzqV9POSK0hjrRojbiRQWahccxQRKfg3TcVxNnNjCQWMOJ0YzNuQ0ZSTLPO3QA4v/0cwD5nBhPdhowAnMUb4j61HsPdaQnKXvlx377vbMOowWJFqGC1ES1rKn843GMu81HL7FJsfrpqglmmFTddG3IwkeJU7umxj41+anidgCco7Jzbii9D9e4l2DF3EuhYg+qIuiwNw4ACh3olxSGStXl952V/dY=

Signatures

SilverRat
SilverRat is trojan written in C#.
trojan silverrat
Silverrat family
silverrat

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
3200	attrib.exe
4068	attrib.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	Adobe Photoshop.scr
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	$77Adobe Photoshop.scr

Executes dropped EXE 1 IoCs

pid	Process
864	$77Adobe Photoshop.scr

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "\"C:\\Users\\Admin\\AppData\\Roaming\\sysfig\\$77Adobe Photoshop.scr\""	Adobe Photoshop.scr

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
20	discord.com
21	discord.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4976	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4728	schtasks.exe
540	schtasks.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
5096	Adobe Photoshop.scr
864	$77Adobe Photoshop.scr

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5096	Adobe Photoshop.scr
Token: SeDebugPrivilege	864	$77Adobe Photoshop.scr

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
864	$77Adobe Photoshop.scr

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 5096 wrote to memory of 3200	5096	Adobe Photoshop.scr	82
PID 5096 wrote to memory of 3200	5096	Adobe Photoshop.scr	82
PID 5096 wrote to memory of 4068	5096	Adobe Photoshop.scr	84
PID 5096 wrote to memory of 4068	5096	Adobe Photoshop.scr	84
PID 5096 wrote to memory of 1436	5096	Adobe Photoshop.scr	93
PID 5096 wrote to memory of 1436	5096	Adobe Photoshop.scr	93
PID 1436 wrote to memory of 4976	1436	cmd.exe	95
PID 1436 wrote to memory of 4976	1436	cmd.exe	95
PID 1436 wrote to memory of 864	1436	cmd.exe	96
PID 1436 wrote to memory of 864	1436	cmd.exe	96
PID 864 wrote to memory of 2668	864	$77Adobe Photoshop.scr	97
PID 864 wrote to memory of 2668	864	$77Adobe Photoshop.scr	97
PID 864 wrote to memory of 4728	864	$77Adobe Photoshop.scr	99
PID 864 wrote to memory of 4728	864	$77Adobe Photoshop.scr	99
PID 864 wrote to memory of 2632	864	$77Adobe Photoshop.scr	101
PID 864 wrote to memory of 2632	864	$77Adobe Photoshop.scr	101
PID 864 wrote to memory of 540	864	$77Adobe Photoshop.scr	103
PID 864 wrote to memory of 540	864	$77Adobe Photoshop.scr	103

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3200	attrib.exe
4068	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Adobe Photoshop.scr
"C:\Users\Admin\AppData\Local\Temp\Adobe Photoshop.scr" /S
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5096
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\sysfig"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:3200
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\sysfig\$77Adobe Photoshop.scr"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:4068
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC841.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1436
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4976
- - C:\Users\Admin\AppData\Roaming\sysfig\$77Adobe Photoshop.scr
    "C:\Users\Admin\AppData\Roaming\sysfig\$77Adobe Photoshop.scr"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:864
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77Adobe Photoshop.scr
      4⤵
      PID:2668
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77Adobe Photoshop.scr" /TR "C:\Users\Admin\AppData\Roaming\sysfig\$77Adobe Photoshop.scr \"\$77Adobe Photoshop.scr\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:4728
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77Adobe Photoshop.scr
      4⤵
      PID:2632
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "Adobe Photoshop_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:540

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC841.tmp.bat

Filesize
169B

MD5
8b0180d9ade188c7748a2c7fc36456d3

SHA1
bfc6906872fc16fe11cb4299b07e8365665503b7

SHA256
6271b9671a8154607e7fe07c7c4d5d206c070c2e5767f4a238329a4caadbb333

SHA512
1c5cf8b4637d9f1ced9d1773a3d9ed84dee7f557e9e0ed02f5ad81316d9e6030f5b97ae1836d91583359c35880a0bc67b6df33410e90b228cc636a07b2528f9f

Download Submit
C:\Users\Admin\AppData\Roaming\sysfig\$77Adobe Photoshop.scr

Filesize
49KB

MD5
ea2a040747c7fde2a7a96a1a8d346823

SHA1
2e4573e863fbd174fa3e12c8e2d57f2d6dc4f8ea

SHA256
8c090285f4fee9ef2441de1c9a6404ec10afb06aa606194b09ee8b0e615990d6

SHA512
4bfb7cb68a3a5eea737e089d3947a51a1b39d615985505e5d8ab27b214b0f1655bf9f203701694342e5edacb6c204938358460f04a5bc2d2f58ffb6b8961afe2

Download Submit
memory/864-12-0x00007FFF703D0000-0x00007FFF70E91000-memory.dmp

Filesize
10.8MB

Download
memory/5096-0-0x00007FFF703D3000-0x00007FFF703D5000-memory.dmp

Filesize
8KB

Download
memory/5096-1-0x0000000000F60000-0x0000000000F70000-memory.dmp

Filesize
64KB

Download
memory/5096-2-0x00007FFF703D0000-0x00007FFF70E91000-memory.dmp

Filesize
10.8MB

Download
memory/5096-4-0x00007FFF703D3000-0x00007FFF703D5000-memory.dmp

Filesize
8KB

Download
memory/5096-5-0x00007FFF703D0000-0x00007FFF70E91000-memory.dmp

Filesize
10.8MB

Download
memory/5096-10-0x00007FFF703D0000-0x00007FFF70E91000-memory.dmp

Filesize
10.8MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads